Pump



Dec. 15, 1925. 1,565,620

' N. E. BRIGHAM PUMP Filed Aug. 10, 1921 Patentedl Dec. 15, 1925.

UNITED STATES PATENT oFF-'Ica NELSON E. BRIGHAM, OF SUTH' HADLEY FALLS, MASSACHUSETTS, ASSIGNOR T0.

WOBTHINGTON PUMP AND MACHINEBY'COMPANY, '0F NEW YORK, N. Y., A COR- PORATION F VIRGINIA.

PUMP.

Application vled August 1.0, 1921. Serial No. 491,098.

To all lwhom t may concern.'

Be it known that I, NELSON E. BRIGHAM, a citizen of the United States, residing at South Hadley Falls, county of Hampshire, and State of Massachusetts, have invented certain new and useful Improvements in Pum s, fully described and represented in the ollowing specification and the accompanying drawings, forming a part of the same. Y

This invention relates to improvements in pumps.

It is an object of the present invention to provide improved means for protecting the operating parts of pumps and the like, and

especially those pumps having outside packed pump plungers and crosshead guides, and also for preventingr loss of lubricant in apparatus where splash lubrication is 'depended upon, such means consisting of a novel construction of shield for the moving parts and a crank casing having an air vent therein of such construction as to prevent loss of lubricant, such shield and crank casing also efl'ectually preventing access of dirt and other foreign substances to the outside packed pump plunger, crosshead guide and crank casing and thereby increasing the efliciency of the pump and prolonging the life of the pumping elements.

For a fullunderstanding of the invention, a detailed description of a preferred embodiment thereof will now be given in connection with the accompanying drawin s, and the novel features then be speci cally pointed out in the claims.

In the drawings- Figure l is a vertical central section longitudinally of the pump plunger;

Figure 2 is a section on the line 2-2 of Fig. l;

igure 3 isa view, partly in section; looking toward the inside of the removable section of the crank casing.

'Referring now to the drawings, and particularly to Fig. 1, the pump construction :onsists of cylinder casting A, pum olunger B, suction and discharge valves D, respectively, discharge air chamberl E ind pulsation chamber F. The crosshead G Ls preferably formed by enlarging the pump plunger, is suitably packed, and works in an )pen Aended guide '10, such crosshead and guide' also preferabl being of cylindrical form. The crosshea G is linked' y pin 11 to eccentric connection 12 on eccentric disk 13, keyed to the driving Shaft H, which is driven in any suitable manner, such, for eX- ample, as by belt pulley K.

'lhe shield `for protecting the pump cradle, indicated at 14, is preferably of pressed steel, and encloses entirely the pump cradle, fitting closely in flanged recesses in .the fixed vart of the crank casing `and front face o the cylinder casting A. By

accurately fitting the shield at these points able configuration in cross-section may be formed in the shield 14, preferably running transversely and longitudinally thereof, to increase the strength and springiness of the shield. The provision of this shield, while enabling ready determination of the oil level in the crank casing, as above explained, also prevents entrance of dirt and other foreign matter through the crosshead guide, pump plunger packing and crank casing at the sight opening 18.

The crank casing is formed with a removable section 20, secured in position in any suitable manner, in which is formed an air vent 21 having an internal ange 22, such vent being provided with a removable cover 23. The cover 23 has formed, preferably integrally therewith, a plurality of ribs 24, three Such ribs being shown in the .present instance, which'extend downwardly through the air vent to a point beyond the 'internal flange 22. One or more of such ribs may be cut away, as at 25, if desired, t'o facilitate passage of air therethrough. It will be obvious that a cover and vent of the construction shown forms a protected opening which eifectually prevents splashing of lubricant therethrough while securing the desired air circulation in the crank casing, and also prevents access of dirt etc. to such casing.

The pump may be readily primed by the arrangement shown, which is the subject matter of a separate application for Letters Patent, such arrangement consisting of a priming basin l, preferably and as shown formed on the cylinder head, such basin having an opening 2 in the bottom thereof normally closed by a plug 3, which may be a screw plug, as shown. The opening 2, when the plug 3 is removed, is in communication with an extension 4 of the plunger chamber F, the shape and location of such extension being preferably, and as shown, .with its bottom slightly inclined to facilitate How of the priming liquid, and with a flat top, to prevent formation of air pockets. The suction air chamber L is j in communication with the atmosphere through a passage 5 controlled by cock 6, the end of the passage 5 being conveniently closed by a screw plug 7 The operation of the priming means above described is as follows: Plug 3 in priming basin l having been removed and the cock 6 closed, priming liquid is supplied to such basin until the pulsation chamber F is filled, which is indicated when the liquid level reaches any point in the basin 1. The plug 3 is then replaced in opening 2 and the pump started, and the cock 6 being opened suiiciently to admit air after priming has been effected.

If desired, an air shifting nozzle, indicated generally at 8, connecting the priming basin l and passage 5, may be provided, for automatically supplying air to the air chamber and through the pump to the discharge air chamber, such air being automatically admitted to the suction air chamber when the liquid level in the priming basin has lowered sufficiently to expose the nozzle orifice to the atmosphere, the cock 6 in this case remaining closed at all times and the liquid in the basin being drawn, during the priming operation, into the suction air chamber and then into the pump cylinder.

It will be understood that various modifications ma be made in the features of construction a ove described and still be within the scope of the claims, and it will also be understood that the invention is not to be confined to use solely with pumps of the type shown, but may be applied to various other pump constructions and the like with equal advantage.

What is claimed is:

1. The combination with a pump frame having a pump cylinder and crosshead guide integral therewith, an outside packed pump plunger and crosshead working in said cylinder and guide and a shaft and connection to the crosshead for reciprocating said plunger, of a metallic shield for the exposed operating parts, said shield being secured in position by spring engagement with the pump frame.

2. The combination with a pump frame having a pump cylinder and crosshead guide integral therewith, an outside packed pump plunger and crosshead working in said cylinder and guide and a shaft and connection to the crosshead for reciprocating said plunger, of projections on said pump frame, and a metallic shield for the operating parts held in position by spring engagement with said projections.

3. The combination with a pump frame having a pump cylinder and crosshead guide integral therewith, an outside packed pump plunger and crosshead working in said cylinder and guide and a shaft and vconnection to the crosshead for reciprocat- 'lng said plunger, of a crank case section formed integral with said pump frame and having a removable section, an air vent formed in said crank casing, and a cover for said vent, said cover having ribs thereon adapted to extend into the vent opening and form protected passages for air and exclude dirt from said casing. y

In testimony whereof, I have hereunto set my hand.

NELSON E. BRIGHAM. 

